A water rocket, launched from the ground, rises vertically with acceleration of 20 m/s2 for 1.0 s when it runs out of "fuel.". Disregarding air resistance, how high will the rocket rise?
a. 15 m
c. 61 m
b. 30 m
d. 102 m
B
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Conservation of Momentum: In a police ballistics test, 2.00-g bullet traveling at 700 m/s suddenly hits and becomes embedded in a stationary 5.00-kg wood block. What is the speed of the block immediately after the bullet has stopped moving relative to the block?
Fill in the blank(s) with the appropriate word(s).
Acceleration: A water rocket can reach a speed of 75 m/s in 0.050 seconds from launch. What is its average acceleration?
Fill in the blank(s) with the appropriate word(s).
Rotational Kinetic Energy: A pencil that is 15.7 cm long is released from a vertical position with the eraser end resting on a table. The eraser does not slip as it tips over. Treat the pencil like a uniform rod. What is the angular speed of the pencil just before it hits the table?
A. 13.7 rad/s B. 7.23 rad/s C. 3.70 rad/s D. 24.5 rad/s E. 16.8 rad/s
Our solar system is located about 27,000 light-years from the galactic center. How far does our solar system travel in one orbit?
A) 85,000 light-years B) 54,000 light-years C) 100,000 light-years D) 170,000 light-years